schema {
   query: Query
   mutation: Mutation
}

type Post {
   id: String
   content: String
   likedBy: [User]
   comments: [String]
   createdAt: String
   lastModified: String
   version: Int
}

type User {
   username: String
   name: String
   email: String
}

type Query {
   post(id : String!): Post
   allPosts : [Post]
}

type Mutation {
   createPost(input: PostInput!) : Post
   deletePost(id : String!) : Boolean
   updatePost(input: PostInput!) : Post
   likePost(postId: String!, user: UserInput!) : Post
   addComment(postId: String!, comment: String!) : Post
}

input PostInput {
   id: String
   content: String
}

input UserInput {
   username: String
   name: String
   email: String
}